How to Calculate OEE at the Plant Level?

In this video, Walker Reynolds answers a question we get all the time: What method do I use to Calculate or Summarize OEE at the Area Level and at the Plant Level?

Do I average the Line OEE Numbers together?

Or do I sum up production time, production units, and total planned production time and then re-calculate OEE using those numbers?

The answer is the second one.

Want to learn more about Implementing OEE in your Manufacturing Plant?

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[rickeybrecheen]

How about the difference in calculations of OEE 1 and OEE2

[ykruzz]

I disagree with your Area OEE calculation method of using aggregates. That method will make sense only if the Net Ideal cycle time used on your Performance (P) factor of the OEE calculation is exactly the same across all production lines. If one of the lines makes 1000 parts per hour and the next one makes 50 parts per hour on the same area you will get completely skewed and incorrect results following your aggregate method.

[realtvv]

It would be great to see a complex example where for instance you have multiple cells in a line with one operator each cell and multiple equipment options. Iam a beginner at this so excuse my ignorance. Love the content currently trying to put together tableau dashboard for the site using data from mes system.